NSLayoutConstraint UIInputSetContainerView状态栏

Question

平台：iOS XCode langugae：Objective-C的 当状态栏高度为40px时，我们运行代码，错误发生如下

     Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. 
    Try this: 
        (1) look at each constraint and try to figure out which you don't expect; 
        (2) find the code that added the unwanted constraint or constraints and fix it. 
[
    <NSLayoutConstraint:0x7fe903dd5940 UIInputSetContainerView:0x7fe903dd2e50.top == UITextEffectsWindow:0x7fe903e554b0.top + 20>,
    <NSLayoutConstraint:0x7fe903d82c00 UIInputSetContainerView:0x7fe903dd2e50.top == UITextEffectsWindow:0x7fe903e554b0.top>
]

Will attempt to recover by breaking constraint 

    <NSLayoutConstraint:0x7fe903dd5940  UInputSetContainerView:0x7fe903dd2e50.top == UITextEffectsWindow:0x7fe903e554b0.top>

那我该怎么办？AppDelegate的窗口改变了位置。

normal situation

problem